When Sony unveiled the successor to the PSP, code-named the NGP, earlier this year it promised the device would be on the market by the end of 2011. But then Japan got hit with its most powerful earthquake on record.

Now, according to Sony Computer Entertainment America president Jack Tretton, that might cause a very understandable backtrack on the earlier release promise.

“It may be the straw that says ‘Maybe we get to just one market by the end of the year,'” Tretton said.